EP 1128033 A3 20031105 - Diagnosis device for an engine
Title (en)
Diagnosis device for an engine
Title (de)
Diagnosevorrichtung für eine Brennkraftmaschine
Title (fr)
Dispositif de diagnostic pour un moteur à combustion
Publication
Application
Priority
JP 2000051939 A 20000228
Abstract (en)
[origin: EP1128033A2] A diagnosis system for an engine (100) including an exhaust pipe (10), a hydrocarbon (HC) absorbent (11) arranged within the exhaust pipe (10), an upstream air/fuel ratio sensor (12) arranged upstream of the HC absorbent (11) and detecting a wide range air/fuel ratio of an exhaust gas, a downstream air/fuel ratio sensor (13) arranged downstream of the HC absorbent (11) and detecting rich or lean with respect to stoichiometric air/fuel ratio of the exhaust gas, and a control unit (16), the control unit (16) includes means (31) for correcting an air/fuel ratio upstream of the HC absorbent (11), means (30) for correcting an air/fuel ratio downstream of the HC absorbent (11), and means (28) for predicting a HC absorbing amount of the HC absorbent (11), the means (31) for correcting the air/fuel ratio upstream of the HC absorbent (11) correcting and controlling an output value of the upstream air/fuel ratio sensor (12) toward lean, the means (28) for predicting the HC absorbing amount of the HC absorbent (11) predicting an absorbing performance of the HC absorbent (11) on the basis of a difference between an output value of the upstream air/fuel ratio sensor (12) and a predetermined value C during a period from a timing where a temperature of the HC absorbent (11) becomes higher than or equal to a predetermined value A and the output value of the upstream air/fuel ratio sensor (12) is corrected and controlled toward lean to a timing where the temperature becomes lower than or equal to a predetermined value B. <IMAGE>
IPC 1-7
IPC 8 full level
F02D 45/00 (2006.01); B01D 53/86 (2006.01); B01D 53/94 (2006.01); F01N 3/08 (2006.01); F01N 3/18 (2006.01); F01N 3/24 (2006.01); F01N 11/00 (2006.01); F02D 41/02 (2006.01); F02D 41/14 (2006.01); F01N 13/02 (2010.01)
CPC (source: EP US)
F01N 3/0835 (2013.01 - EP US); F01N 11/00 (2013.01 - EP US); F01N 11/007 (2013.01 - EP US); F01N 13/009 (2014.06 - EP US); F02D 41/027 (2013.01 - EP US); F02D 41/1441 (2013.01 - EP US); F02D 41/1495 (2013.01 - EP US); F01N 2550/03 (2013.01 - EP US); F01N 2570/12 (2013.01 - EP US); F02D 41/1456 (2013.01 - EP US); F02D 2200/0802 (2013.01 - EP US); Y02T 10/12 (2013.01 - EP US); Y02T 10/40 (2013.01 - EP US)
Citation (search report)
- [PA] US 6185933 B1 20010213 - TSUZUKI MIKIO [JP], et al
- [A] EP 0778401 A2 19970611 - BAYERISCHE MOTOREN WERKE AG [DE]
- [A] US 5524433 A 19960611 - ADAMCZYK JR ANDREW A [US], et al
- [DA] PATENT ABSTRACTS OF JAPAN vol. 1996, no. 09 30 September 1996 (1996-09-30)
- [A] PATENT ABSTRACTS OF JAPAN vol. 017, no. 282 (M - 1420) 31 May 1993 (1993-05-31)
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR
DOCDB simple family (publication)
EP 1128033 A2 20010829; EP 1128033 A3 20031105; JP 2001241319 A 20010907; US 2001017056 A1 20010830; US 2002129599 A1 20020919; US 2003000207 A1 20030102
DOCDB simple family (application)
EP 01103674 A 20010223; JP 2000051939 A 20000228; US 13358502 A 20020429; US 22745002 A 20020826; US 79310901 A 20010227